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Ocfs2/refcounttree: Publicize couple of funcs from refcounttree.c 

The original goal of commonizing these funcs is to benefit defraging/extent_moving
codes in the future,  based on the fact that reflink and defragmentation having
the same Copy-On-Wrtie mechanism.

Signed-off-by: Tristan Ye <tristan.ye@oracle.com>
This commit is contained in:
Tristan Ye 2011-05-24 16:21:20 +08:00
parent d24a10b9f8
commit 3e19a25e05
2 changed files with 40 additions and 29 deletions
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58
fs/ocfs2/refcounttree.c
View File

@ -66,7 +66,7 @@ struct ocfs2_cow_context {
u32 *num_clusters,
unsigned int *extent_flags);
int (*cow_duplicate_clusters)(handle_t *handle,
struct ocfs2_cow_context *context,
struct file *file,
u32 cpos, u32 old_cluster,
u32 new_cluster, u32 new_len);
};
@ -2921,20 +2921,21 @@ static int ocfs2_clear_cow_buffer(handle_t *handle, struct buffer_head *bh)
return 0;
}
static int ocfs2_duplicate_clusters_by_page(handle_t *handle,
struct ocfs2_cow_context *context,
u32 cpos, u32 old_cluster,
u32 new_cluster, u32 new_len)
int ocfs2_duplicate_clusters_by_page(handle_t *handle,
struct file *file,
u32 cpos, u32 old_cluster,
u32 new_cluster, u32 new_len)
{
int ret = 0, partial;
struct ocfs2_caching_info *ci = context->data_et.et_ci;
struct inode *inode = file->f_path.dentry->d_inode;
struct ocfs2_caching_info *ci = INODE_CACHE(inode);
struct super_block *sb = ocfs2_metadata_cache_get_super(ci);
u64 new_block = ocfs2_clusters_to_blocks(sb, new_cluster);
struct page *page;
pgoff_t page_index;
unsigned int from, to, readahead_pages;
loff_t offset, end, map_end;
struct address_space *mapping = context->inode->i_mapping;
struct address_space *mapping = inode->i_mapping;
trace_ocfs2_duplicate_clusters_by_page(cpos, old_cluster,
new_cluster, new_len);
@ -2948,8 +2949,8 @@ static int ocfs2_duplicate_clusters_by_page(handle_t *handle,
* We only duplicate pages until we reach the page contains i_size - 1.
* So trim 'end' to i_size.
*/
if (end > i_size_read(context->inode))
end = i_size_read(context->inode);
if (end > i_size_read(inode))
end = i_size_read(inode);
while (offset < end) {
page_index = offset >> PAGE_CACHE_SHIFT;
@ -2972,10 +2973,9 @@ static int ocfs2_duplicate_clusters_by_page(handle_t *handle,
if (PAGE_CACHE_SIZE <= OCFS2_SB(sb)->s_clustersize)
BUG_ON(PageDirty(page));
if (PageReadahead(page) && context->file) {
if (PageReadahead(page)) {
page_cache_async_readahead(mapping,
&context->file->f_ra,
context->file,
&file->f_ra, file,
page, page_index,
readahead_pages);
}
@ -2999,8 +2999,7 @@ static int ocfs2_duplicate_clusters_by_page(handle_t *handle,
}
}
ocfs2_map_and_dirty_page(context->inode,
handle, from, to,
ocfs2_map_and_dirty_page(inode, handle, from, to,
page, 0, &new_block);
mark_page_accessed(page);
unlock:
@ -3015,14 +3014,15 @@ unlock:
return ret;
}
static int ocfs2_duplicate_clusters_by_jbd(handle_t *handle,
struct ocfs2_cow_context *context,
u32 cpos, u32 old_cluster,
u32 new_cluster, u32 new_len)
int ocfs2_duplicate_clusters_by_jbd(handle_t *handle,
struct file *file,
u32 cpos, u32 old_cluster,
u32 new_cluster, u32 new_len)
{
int ret = 0;
struct super_block *sb = context->inode->i_sb;
struct ocfs2_caching_info *ci = context->data_et.et_ci;
struct inode *inode = file->f_path.dentry->d_inode;
struct super_block *sb = inode->i_sb;
struct ocfs2_caching_info *ci = INODE_CACHE(inode);
int i, blocks = ocfs2_clusters_to_blocks(sb, new_len);
u64 old_block = ocfs2_clusters_to_blocks(sb, old_cluster);
u64 new_block = ocfs2_clusters_to_blocks(sb, new_cluster);
@ -3145,8 +3145,8 @@ static int ocfs2_replace_clusters(handle_t *handle,
/*If the old clusters is unwritten, no need to duplicate. */
if (!(ext_flags & OCFS2_EXT_UNWRITTEN)) {
ret = context->cow_duplicate_clusters(handle, context, cpos,
old, new, len);
ret = context->cow_duplicate_clusters(handle, context->file,
cpos, old, new, len);
if (ret) {
mlog_errno(ret);
goto out;
@ -3162,22 +3162,22 @@ out:
return ret;
}
static int ocfs2_cow_sync_writeback(struct super_block *sb,
struct ocfs2_cow_context *context,
u32 cpos, u32 num_clusters)
int ocfs2_cow_sync_writeback(struct super_block *sb,
struct inode *inode,
u32 cpos, u32 num_clusters)
{
int ret = 0;
loff_t offset, end, map_end;
pgoff_t page_index;
struct page *page;
if (ocfs2_should_order_data(context->inode))
if (ocfs2_should_order_data(inode))
return 0;
offset = ((loff_t)cpos) << OCFS2_SB(sb)->s_clustersize_bits;
end = offset + (num_clusters << OCFS2_SB(sb)->s_clustersize_bits);
ret = filemap_fdatawrite_range(context->inode->i_mapping,
ret = filemap_fdatawrite_range(inode->i_mapping,
offset, end - 1);
if (ret < 0) {
mlog_errno(ret);
@ -3190,7 +3190,7 @@ static int ocfs2_cow_sync_writeback(struct super_block *sb,
if (map_end > end)
map_end = end;
page = find_or_create_page(context->inode->i_mapping,
page = find_or_create_page(inode->i_mapping,
page_index, GFP_NOFS);
BUG_ON(!page);
@ -3349,7 +3349,7 @@ static int ocfs2_make_clusters_writable(struct super_block *sb,
* in write-back mode.
*/
if (context->get_clusters == ocfs2_di_get_clusters) {
ret = ocfs2_cow_sync_writeback(sb, context, cpos,
ret = ocfs2_cow_sync_writeback(sb, context->inode, cpos,
orig_num_clusters);
if (ret)
mlog_errno(ret);

11
fs/ocfs2/refcounttree.h
View File

@ -84,6 +84,17 @@ int ocfs2_refcount_cow_xattr(struct inode *inode,
struct buffer_head *ref_root_bh,
u32 cpos, u32 write_len,
struct ocfs2_post_refcount *post);
int ocfs2_duplicate_clusters_by_page(handle_t *handle,
struct file *file,
u32 cpos, u32 old_cluster,
u32 new_cluster, u32 new_len);
int ocfs2_duplicate_clusters_by_jbd(handle_t *handle,
struct file *file,
u32 cpos, u32 old_cluster,
u32 new_cluster, u32 new_len);
int ocfs2_cow_sync_writeback(struct super_block *sb,
struct inode *inode,
u32 cpos, u32 num_clusters);
int ocfs2_add_refcount_flag(struct inode *inode,
struct ocfs2_extent_tree *data_et,
struct ocfs2_caching_info *ref_ci,